"Home borrows characters from Gilead but centers on Ames's friend Reverend Robert Boughton and his troubled son Jack. Robinson returned to the same territory as Gilead because, she said, 'after I write a novel or a story, I miss the characters--I feel sort of bereaved.'" (emphasis added)Source: Marilynne Robinson, interviewed by Sarah Fay, The Paris Review, fall 2008.
I don't have multiple novels to my credit, but I have to admit that I, too, have enjoyed reviving characters from one story to appear in another.
What about you?